title: Cytogenetic studies of 44 T-cell acute lymphoblastic leukemias.
abstract: Cytogenetic studies on 44 patients with T-cell acute lymphoblastic leukemia (ALL) were reported. The incidence of leukemia without detectable chromosomal changes was 25%. Hyperdiploidy with more than 50 chromosomes was found in only one patient. Previously described nonrandom abnormalities like 6q-, 9p-, and 12p- were observed, and it was confirmed that they are not specific for a particular type of ALL. The incidence of chromosomal rearrangements on chromosomes 7 and 14 where the T-cell receptor gene loci are located was 36% of those with abnormal karyotypes and 27% of the total. This was clearly different from the frequency of rearrangements of these bands found in T-cell lymphoma. Finally, a rearrangement on bands 11q14-q21 was detected in five cases.
authors.affiliation: Laboratoire de Cytogénétique, Unité INSERM U. 301, Hôpital Saint-Louis, Paris, France.
authors.forename: R
authors.initials: R
authors.lastname: Berger
authors.forename: M
authors.initials: M
authors.lastname: Le Coniat
authors.forename: D
authors.initials: D
authors.lastname: Vecchione
authors.forename: J
authors.initials: J
authors.lastname: Derré
authors.forename: S J
authors.initials: SJ
authors.lastname: Chen
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D002869:Chromosome Aberrations; D002883:Chromosomes, Human, Pair 14; D002897:Chromosomes, Human, Pair 7; D005260:Female; D005819:Genetic Markers; D006801:Humans; D015459:Leukemia-Lymphoma, Adult T-Cell / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D011948:Receptors, Antigen, T-Cell / Q000235:genetics
chemical_list: D005819:Genetic Markers; D011948:Receptors, Antigen, T-Cell